Clutch.



H. MANN.

CLUTCH.

APPLIGATION FILED 00T. 2, 1912.

Patented N0v.4,1913.

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Usme STATES meer eme HORACE MANN, or MUsKneoN, MICHIGAN.

CLUTCH.

1,077,728. Specification of Letters Patent. Patented NOV, 4;, 1913,Application filed October 2, 1912. Serial No. 723,541.

To all whom t may concern: may serve as a pulley. The portion of the Beit known that I, HORACE MANN, a citihub which lies within the ldrum isprovided zen of the United States of America, residwith a series ofeccentric surfaces Ll, four ing at Muskegon, in the county of Muskebeingshown in the drawings, landfclutch 60 gon and State of Michigan, yhaveinvented members 5 are slidably mounted on lthese certain new and usefulImprovements in eccentric faces and are of such shape that Clutches; andI do hereby declare the folwhen slid outward their combined surfaceslowing to be a full, clear, and exact descripwill form practically atrue circle and will tion of the invention, such as will enable engagethe inner surface of the drum to 6 others skllledin the art to which itapperlock it to the hub. The clutch members are tains to make land usethe same. f preferably provided on their inner surfaces My inventionrelates to limprovements in with dove-tail projections 6 which litwithin clutches and more particularly to the l,soand traverse dove-tailways in the eccentric called internal expanding type, and itsobsurfaces4. yThe slidable clutch vmembers are 7e ject is to provide va clutch ofthis character actuatedv by means of bell Vcrank levers 7 which will bepositively operated in both which are pivoted iny the hub, one end ofdirections, vand to provide the same with each bell crank being insertedlin a recess 8 various new and useful features hereinafter in one ,ofthe clutch members 5 their oppomore fully described, and particularlysite ends being inserted in the recesses 9 in 75 pointed lout in theclaims. radially slidable rods 10 there being one of ythis deviceconsists essentially of a hub these rods provided Vfor each bell crankand adapted to be fixed to a shaft and a drum clutch member.rlheseradial rods are cut surrounding the hub, the periphery `of whichaway or made thinner at their inner may serve as aV driving pulley. Thehub also ends to allow longitudinally slidablerods so being providedwith a series of eccentric 12 to lap over them. The ends of the surfacesand ,clutch members arranged to -longitudinal rods which overlap theratraverse Vthese surfaces Vand engage the inner dial rods being alsoyCut away making face of the drum to lock the vsame to the them thinnerat' this point. The radial rods hub. A'series of bell cranks are locatedare provided with projections 11 which 85 in the hub and are actuated byradial and traverse inclined cam grooves 13 in the longitudinal rods toboth positively engage longitudinal rods. The ends of the longiordisengage the clutch members, said radial tudinal rods project outsideof the hub and and longitudinal lOdS being' Sl'ldable cmd are attachedto the collar 14: whichsurrounds having a cam and groove connection andthe shaft, and is slidable thereon, said collar 9e are operated by aslidable collar which being provided with-an annular groove 15 insurrounds the shaft and is attached to the which'a yoke may be placed tooperatethe longitudinal rods. The device is also prosame, 1t will begeen that, by Sliding the vided with various other new and useful collar14 on the shaft the longitudinal rods. features of construction andarrangement as in the hub will also be made to move which e5 will morefully appear by reference to Vthe will actuate the radial rods 10 andmove the accompanying drawings, in which: bell'crank levers 7. As thebell crank levers Figure 1 is an aXial section of a device move theclutch members 5 are slid upon embodying my invention. Fig. 2 is atranstheir respective eccentric faces and grip or verse section on theline 2-2 of Fig. 1. Fig. release the inner surface of the drum 3. 10o 3is an enlarged perspective view of one of This movement also beingpositive to effectlle radial lOdS; and Fig'. l '1S an enlarged tuallyrelease the drum. perspective view of one of the longitudinal When theclutch members 5 are slid back rods. upon the eccentric faces and aredisengaged Like numbers refer to like parts 1n all from the drum it isdesirable to provide the 105 of the figures. same with means to preventthem from inad- 1 represents the shaft which may be either vertentlysliding outward by centrifugal the driving or the driven shaft asdesired. force or vibration to rengage the drum.

2 is a hub xed on the shaft and rotating This is done by laying a coiledspring 16 in therewith. a rabbet formed in the edges of the clutch 3 isa drum which is rotative upon and member 5, said coiled spring havingits surrounds the hub. The periphery 3EL of this ends attached to eachother and formed in an annulus and exerting a constant tension on theclutch members to draw them inward and hold them out of engagement withthe drum. The action of this spring is Weak enough so that it may beeasily overcome by operating the clutch members by means provided forthat purpose.

l/V hen the drum is used as a driving member the rotation of the drumand shaft are preferably from left to right or a clockwise rotation asviewed in Fig. 2 so that the clutch members when once engaged will bewedged firmly into place by the power exerted through them. Should theshaft and hub be used as the driving members the rotation wouldpreferably be the reverse or anti-clock Wise for the same purpose.

`What I claim is:

l. A clutch, comprising a hub, a drum surrounding the hub, andindependently rotative, eccentric faces on the hub, slidable clutchmembers on the eccentric faces to engage the inner surface of the drum,and positive means for actuating the clutch members into and out ofengagement. 12. A clutch, comprising a hub, a drum surrounding the hub,and independently rotative, clutch members carried by the hub andfrictionally engaging the drum, and means for positively moving the saidmembers into engagement with the drum, and also adapted to positivelymove thersame out of said contact. Y

3. A clutch, comprising a hub, a drum surrounding the hub andindependently rotative, clutch members carried by the hub, adapted toengage the drum, radially slidable rods connected to said members tomove the same in opposite directions, longitudinally slidable rodsconnected to the radially movable rods to move the same in bothdirections, and means for operating the last named rods.

4. A clutch, comprising a hub, a drum surrounding the hub andindependently rotative eccentric faces on the hub,slidable clutchmembers on the eccentric faces, bell y to the bell crank levers,

crank levers pivoted on the hub and connected to the clutch members toslide the same, radially slidable rods attached to the bell cranklevers, longitudinally slidable rods overlapping the radial rods, saidrods also having inclined cam grooves and projections to traverse theinclined grooves, and a slidable collar on the shaft to Which thelongitudinally slidable rods are attached.

5. A clutch, comprising a hub, a drum surrounding the hub, expandingmembers on the hub to engage the drum, bell cranks pivoted to the huband attached to the expanding members to open and close the same,radially slidable rods in the hub attached longitudinally slidable rodsin the hub overlapping the radial rods, said rods having inclined camgrooves in the longitudinal rods and projections on the radial rods totraverse the cam grooves, and a slidable collar on the shaft to whichthe longitudinal rods are attached.

6. A clutch, comprising a hub adaptedto be fixed on a shaft, a drumsurrounding the hub, eccentric faces on the hub provided with dove-tailWays, dove-tail projections on the inner surfaces of the clutch membersto traverse the dove-tail Ways,ran annular rabbet in the periphery ofthe clutch members, an annular coiled spring in the rabbet, beilcranklevers pivoted in the hub and attached to the clutch members, radiallyslidable rods inthe hub attached to the bell crank levers,longitudinally slidable rods in the hub overlapping the radial rods,said rods having inclined cam grooves in the lon- Y gitudinal rods, andprojections on the radial rods to traverse the inclined grooves, and aslidable collar on the shaft to which the longitudinal rods areattached.

In testimony whereof l afliX my signature in presence of tivo Witnesses.

HORACE MANN.

Witnesses HAROLD O. VAN ANTWERP, LUTHER V. MoUL'roN.

Copies of this patent may be obtained for five cents each, by addressingthe NCommissioner of Patents, Washington, D. C.

